Unidirectional single-mode operation of a diode-pumped Nd:YAG laser with a planar semimonolithic ring cavity has been demonstrated at 1064 nm. The semimonolithic cavity consists of a laser active medium placed in a magnetic field, a crystal quartz plate, and an output coupling mirror, which form an optical diode by acting as a Faraday rotator, a reciprocal polarization rotator, and a partial polarizer, respectively. A single-mode output power of 155 mW and a slope efficiency of 17% were obtained with a 1.2-W diode laser at 809 nm. A laser linewidth of less than 100 kHz is inferred from a beat note frequency spectrum between two identical laser systems and continuous tuning to greater than 2 GHz was observed.
© 1999 Optical Society of America
(140.3530) Lasers and laser optics : Lasers, neodymium
(140.3560) Lasers and laser optics : Lasers, ring
(140.3570) Lasers and laser optics : Lasers, single-mode
(140.3580) Lasers and laser optics : Lasers, solid-state
Jong Rak Park, Tai Hyun Yoon, Myung Sai Chung, and Hai-Woong Lee, "Unidirectional Single-Mode Nd:YAG Laser with a Planar Semimonolithic Ring Cavity," Appl. Opt. 38, 4566-4569 (1999)